left mouse click up/down arrow buttons to increase/decrease order quantities

or press tab key to focus up/down arrow buttons
(press shift key and tab key to reverse direction),
and then press Enter key to increase/decrease order quantities

or just type a number quantity into the white text input

shop links are on all subsequent pages

accepting cookies is not necessary, but 1 session cookie, if accepted, saves 1 single number, and expires when your browser is closed

without the session cookie, the way to continue your order is to use the shop links on each subsequent page, without using your browser's back button